Added CPack definitions and an NSIS template for easy packaging

The "compiler identification" for the path and "Add/Remove Programs" entries (Windows) still need some better solution to not only show "GNU" or "MSVC".

CMakeLists.txt

@@ -388,3 +388,20 @@ elseif(SFML_OS_ANDROID)
     install(FILES src/SFML/Android.mk DESTINATION .)
 
 endif()
+
+set(CPACK_PACKAGE_NAME_SUMMARY "Simple and Fast Multimedia Library")
+set(CPACK_PACKAGE_VENDOR "SFML Team")
+set(CPACK_PACKAGE_FILE_NAME "SFML-${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}-${CMAKE_CXX_COMPILER_ID}-${CMAKE_BUILD_TYPE}")
+set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/readme.txt")
+set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/license.txt")
+set(CPACK_PACKAGE_VERSION_MAJOR "${VERSION_MAJOR}")
+set(CPACK_PACKAGE_VERSION_MINOR "${VERSION_MINOR}")
+set(CPACK_PACKAGE_VERSION_PATCH "${VERSION_PATCH}")
+set(CPACK_PACKAGE_INSTALL_DIRECTORY "SFML ${VERSION_MAJOR}.${VERSION_MINOR}")
+set(CPACK_MONOLITHIC_INSTALL ON)
+set(CPACK_NSIS_DISPLAY_NAME "SFML ${VERSION_MAJOR}.${VERSION_MINOR} (${CMAKE_CXX_COMPILER_ID})")
+set(CPACK_NSIS_CONTACT "team@sfml-dev.org")
+set(NSIS_IMAGE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/tools/nsis/")
+string(REGEX REPLACE "/" "\\\\\\\\" NSIS_IMAGE_PATH ${NSIS_IMAGE_PATH})
+set(CPACK_NSIS_INSTALLER_MUI_ICON_CODE "!define MUI_WELCOMEFINISHPAGE_BITMAP \\\"${NSIS_IMAGE_PATH}sidebar.bmp\\\"\n!define MUI_HEADERIMAGE_BITMAP \\\"${NSIS_IMAGE_PATH}header.bmp\\\"\n!define MUI_ICON \\\"${NSIS_IMAGE_PATH}sfml.ico\\\"")
+include(CPack)